EP1346799A1 - Vorrichtung zum Markieren mittels aufeinander folgender Anschläge - Google Patents

Vorrichtung zum Markieren mittels aufeinander folgender Anschläge Download PDF

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Publication number
EP1346799A1
EP1346799A1 EP03356053A EP03356053A EP1346799A1 EP 1346799 A1 EP1346799 A1 EP 1346799A1 EP 03356053 A EP03356053 A EP 03356053A EP 03356053 A EP03356053 A EP 03356053A EP 1346799 A1 EP1346799 A1 EP 1346799A1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
voltage
controlled switch
order
keep
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03356053A
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English (en)
French (fr)
Inventor
Patrice Auray
Maurice Le Tai Van
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technifor
Original Assignee
Technifor
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technifor filed Critical Technifor
Publication of EP1346799A1 publication Critical patent/EP1346799A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • H01H47/325—Energising current supplied by semiconductor device by switching regulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D5/00—Centre punches
    • B25D5/02—Automatic centre punches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings

Definitions

  • the present invention relates to a device for hollow marking by successive percussions.
  • the propulsion of the tip can be pneumatic, thanks to which two control modes are currently available.
  • the first of these two modes can be qualified as discontinuous or "point by point” and consists of stop the head before each percussion.
  • the rhythm of percussion is set by construction at a frequency predetermined, while the head moves without stop. It follows that with this second mode of steering, which can be described as continuous, the marking can be significantly faster than with the first mode, however, its quality is lower.
  • the marking tip can also be propelled to using an electromagnet. Only the mode previously qualified point by point is then available, because we do not fails to oscillate the tip at a frequency high enough for the continuous steering mode to translate into significant time savings.
  • the marking device shown in Figure 1 comprises a machine 1 for marking objects such as a metal plate 2, as well as a unit 3 for controlling the machine 1.
  • a housing 4 of machine 1 contains means to move, in X and Y directions, a movable head marking 5 worn by machine 1.
  • This head 5 which is very schematically represented in Figure 2, is known per se and has a point mobile 6 intended to strike the plate 2 to leave there traces of hollow impact, as well as an electromagnet 7, masked in FIG. 1.
  • the core 8 of this electromagnet 7 is mobile and intended to be launched against the defining element tip 6 to propel the latter towards plate 2.
  • the electromagnet 7 is electrically supplied by the circuit 9 which is shown in FIG. 2.
  • This circuit 9, according to the invention, includes a source 10 of AC voltage U E and a voltage booster formed by a Latour doubler 11 , the input of which is connected to the terminals of the voltage source 10, the output of this doubler 11 being connected in a main loop in which a series of succeeds in particular the electromagnet 7 and a controlled switch, formed by a transistor 12.
  • the voltage source 10 and the voltage doubler 11 are chosen such that the voltage U S at the output of the doubler 11 is substantially greater than the nominal voltage of the electromagnet 7.
  • This output voltage U S can for example be of the order of several times the nominal voltage of the electromagnet 7.
  • the nominal voltage of the electromagnet 7 is understood to mean the maximum voltage that can be applied indefinitely to the electromagnet 7 without damaging it. In practice, this nominal voltage is a manufacturer data of the electromagnet. It can also be determined at using a sufficiently long test.
  • the transistor 12 is part of a current limiter 13, which is designed to limit the intensity of the current I 7 in the electromagnet 7.
  • This current limiter 13 further comprises a freewheeling diode 14, in parallel with the electromagnet 7, as well as a resistor 15, itself mounted in series with this electromagnet 7, in the main loop.
  • Means 16 for generating a reference voltage U 16 , as well as a comparator 17 are further provided in the current limiter 13.
  • the means 16 and the comparator 17 are connected in such a way that the latter compares the reference voltage U 16 at the voltage U 15 at the terminals of the resistor 15.
  • the output of the comparator 17 is indirectly connected to the control electrode, or gate, of the transistor 12. More specifically, it is connected to one of the two inputs of a logic operator 18, the output of which is connected to the control electrode of transistor 12.
  • the reference voltage U 16 is chosen so as to be equal to the voltage U 15 measured at the terminals of the resistor 15 when the latter is crossed by a current having the maximum intensity I max which the current limiter 13 makes it possible not to overtake in the main loop. If the current I 7 in the electromagnet 7 is less than I max , the voltage U 15 at the terminals of the resistor 15 is less than the reference voltage U 16 and the comparator 17 issues the order to keep the transistor 12 closed. Otherwise, it issues the order to keep this transistor 12 open.
  • the resistor 15 (measurement shunt) is there only to allow the intensity of the current I 7 in the electromagnet 7 to be measured, it is preferable that its presence only slightly disturbs the overall operation of the circuit. In particular, its value is chosen in such a way that the voltage U 15 at its terminals is negligible or low compared to the voltage U S at the output of the doubler 11.
  • the Latour doubler 11 comprises two capacitors 19 and 20, as well as two rectifying diodes 21 and 22.
  • the voltage source 10 supplies two separate branches in parallel. A first branch is formed by putting diode 21 and capacitor 20 in series, and the second branch is formed by diode 22 and capacitor 19 in series, a terminal of capacitor 19 being connected to a terminal of capacitor 20.
  • the output voltage U S of the doubler 11 is collected across the circuit formed by the two capacitors 19 and 20. It supplies the main loop, comprising the transistor 12 and the electromagnet 7.
  • the operation of the Latour doubler 11 is known by itself.
  • a microcontroller 23 is provided to control the operation of the electromagnet 7.
  • one, referenced 24, of its outputs is connected to the other input of the logical operator 18, via a timer 25.
  • This logical operator 18 is of the “AND” type, that is to say capable of verifying the cumulation of two conditions. Specifically, it only executes the order to keep closed transistor 12 only if it receives this command from both comparator 17 and timer 25.
  • the microcontroller 23 is also provided for control a fan 26, a light-emitting diode 27 and a transistor 28, from a signal emitted by a thermistor 29 forming a means of temperature measurement in the immediate vicinity of point 6. More precisely, as soon as this temperature has exceeded a first predetermined threshold, it starts the fan 26, which sends air to tip 6 to cool it. he turn off this fan 26, once the temperature measured by thermistor 29 has gone below one second predetermined threshold, lower than the first threshold. Yes this temperature exceeds a third threshold beyond which tip 6 may deteriorate quickly, the micro-controller 23 lights up the light-emitting diode 27 and closes a transistor 28 in order to signal the presence of a default.
  • the microcontroller 23 has inputs 30 for its programming and three inputs 31 for instructions in from the control unit 3.
  • the elements constituting the power supply circuit 9, y including the logical operator 18, the timer 25 and the microcontroller 23, are installed on a card 32, which is installed in the housing 4, that is to say near of the head 5.
  • the timer 25 is triggered and transmits this order to the logical operator 18.
  • this operator 18 receives the order to close the transistor 12 at the same time the timer 25 and the comparator 17, it closes this transistor 12.
  • the voltage U S is applied to the terminals of the electromagnet 7, in which the capacitors 19 and 20 discharge. We are then on the portion C 2 of the curve shown in Figure 3.
  • the power supplied to this electromagnet 7 and therefore the acceleration of the movable core 8 are much higher than they would be if the voltage applied across the terminals of this electromagnet 7 were of the order of its nominal voltage. It follows that, in accordance with the object of the invention, the time necessary to propel the tip 6 is low, and in particular reduced compared to that obtained using that of the devices of the prior art mentioned in the preamble which comprises an electromagnet .
  • this signal successively comprises an order of keep closed and an order to keep open the transistor 12.
  • the duration of the order of keep transistor 12 and that of order closed contrary are respectively denoted ⁇ T and (1- ⁇ T).
  • the current limiter 13 limits the current intensity I 7 to this maximum value I max (portion C 3 of the curve shown in Figure 3) and thus protects the electromagnet 7 against an overcurrent which would deteriorate it.
  • the logic operator 18 receives from the microcontroller 23, via the timer 25, the order to open the transistor 12, the latter is immediately opened and the electromagnet 7 demagnetizes by generating a current I 7 which passes through the freewheeling diode 14 and decreases rapidly, which corresponds to the portion C 4 of the curve shown in FIG. 3.
  • Period T is chosen to have the frequency of desired percussion. It is advantageously between 8 ms (milliseconds) and 100 ms, and preferably between 12 ms and 40 ms.
  • the duty cycle ⁇ determines the duration during which the mobile core 8 is accelerated and allows therefore to regulate the energy with which the tip 6 strikes the plate to be marked 2.
  • the marking can also be controlled in point by point mode.
  • the microcontroller 23 only starts to issue the order to maintain the transistor 12 closed only after the head 5 has stopped.
  • Timer 25 acts as a safety device in the event of micro-controller 23 failure, no longer transmitting an order to keep transistor 12 closed for more than one certain predetermined duration.
  • capacitors 19 and 20 are also provided for store enough energy to be able to release the desired power, for the desired time, after that the microcontroller 23 has issued the order to close the transistor 12. It will be noted that the voltage rise at using doubler 11 allows this quantity to be stored of energy by means of capacitors 19 and 20 of capacity less, which has the advantage of allowing reduction in the size of the card 32.
  • the use of the voltage doubler 11 makes it possible to use a source 10 delivering a voltage U S sufficiently low to present no danger to the user (safety voltage), which is all the more advantageous since this source 10 is located outside the machine 1, for example in the control unit 3.
  • transistor 12 performs a dual function using the logical operator 18. On the one hand, it is part of the current limiter 13. On the other hand, it is part of the control circuit of the supply of the electromagnet 7. Consequently, this transistor 12 and logic operator 18 can be replaced by two controlled switches such as transistors, these two switches being connected in series with electromagnet 7, in the main loop, and one directly controlled by timer 25 and the other by comparator 17.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP03356053A 2002-03-22 2003-03-21 Vorrichtung zum Markieren mittels aufeinander folgender Anschläge Withdrawn EP1346799A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0203621 2002-03-22
FR0203621A FR2837412A1 (fr) 2002-03-22 2002-03-22 Dispositif de marquage en creux par percussions successives

Publications (1)

Publication Number Publication Date
EP1346799A1 true EP1346799A1 (de) 2003-09-24

Family

ID=27772272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03356053A Withdrawn EP1346799A1 (de) 2002-03-22 2003-03-21 Vorrichtung zum Markieren mittels aufeinander folgender Anschläge

Country Status (7)

Country Link
US (1) US20040012906A1 (de)
EP (1) EP1346799A1 (de)
JP (1) JP2004001192A (de)
CN (1) CN1449967A (de)
BR (1) BR0300707A (de)
CA (1) CA2423208A1 (de)
FR (1) FR2837412A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025036A1 (de) * 2003-04-06 2005-12-15 Andreas Grosse Selbstschlagender Körner mit elektronischer Positioniereinheit
US8328097B2 (en) 2010-08-24 2012-12-11 GM Global Technology Operations LLC Multi-purpose appendable marking method
CN113804758B (zh) * 2021-08-10 2024-03-08 广东省科学院智能制造研究所 一种具有能量回馈功能的磁脉冲敲击器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497974A1 (fr) * 1981-01-09 1982-07-16 Cepe Dispositif de commande rapide de deplacements de faible amplitude d'outils ou d'objets en particulier dispositif de gravure rapide de boitiers metalliques de composants electroniques
US4553074A (en) * 1982-08-03 1985-11-12 Martelec Societe Civile Particuliere Method of and apparatus for the autosynchronization of an electromagnetic hammer
WO1990006237A2 (en) * 1988-11-23 1990-06-14 Datacard Corporation Method and apparatus for driving and controlling an improved solenoid impact imprinter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2356483A1 (fr) * 1976-06-28 1978-01-27 Jacquemet Georges Appareil de percussion electro-magnetique
JPS5910315B2 (ja) * 1978-04-06 1984-03-08 株式会社リコー 衝撃型プリンタの印字ハンマ−駆動制御装置
US4347786A (en) * 1979-10-01 1982-09-07 International Business Machines Corporation Impact printer hammer flight time and velocity sensing means
FR2514049A1 (fr) * 1981-10-02 1983-04-08 Martelec Dispositif de foncage et d'arrachement pour pieux, tubes, palplanches, tiges, etc.
US4729056A (en) * 1986-10-02 1988-03-01 Motorola, Inc. Solenoid driver control circuit with initial boost voltage
US5204802A (en) * 1988-11-23 1993-04-20 Datacard Corporation Method and apparatus for driving and controlling an improved solenoid impact printer
JPH0396370A (ja) * 1989-07-18 1991-04-22 Brother Ind Ltd 印字動作用ソレノイド駆動制御装置
US6545852B1 (en) * 1998-10-07 2003-04-08 Ormanco System and method for controlling an electromagnetic device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497974A1 (fr) * 1981-01-09 1982-07-16 Cepe Dispositif de commande rapide de deplacements de faible amplitude d'outils ou d'objets en particulier dispositif de gravure rapide de boitiers metalliques de composants electroniques
US4553074A (en) * 1982-08-03 1985-11-12 Martelec Societe Civile Particuliere Method of and apparatus for the autosynchronization of an electromagnetic hammer
WO1990006237A2 (en) * 1988-11-23 1990-06-14 Datacard Corporation Method and apparatus for driving and controlling an improved solenoid impact imprinter

Also Published As

Publication number Publication date
FR2837412A1 (fr) 2003-09-26
US20040012906A1 (en) 2004-01-22
JP2004001192A (ja) 2004-01-08
BR0300707A (pt) 2004-09-08
CA2423208A1 (fr) 2003-09-22
CN1449967A (zh) 2003-10-22

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